I can't figure this out how to do this

I really can’t figure this out.I am very new to coding andI am trying to make it so an object moves when you press the arrow keys.This is the code I came up with (It is C#):

using UnityEngine;
using System.Collections;

public class test : MonoBehaviour {

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}
}
enum selectedId : int{_}
enum speed  { _ ,

	function ,Update}  

		 .GetKey KeyCode.UpArrow) transform.Translate (Vector3(0,1,0) * Time.deltaTime*speed;
		if (Input.GetKey (KeyCode.DownArrow)) transform.Translate (Vector3(0,-1,0) * Time.deltaTime*speed);
		if (Input.GetKey (KeyCode.LeftArrow)) transform.Translate (Vector3(-1,0,0) * Time.deltaTime*speed);
		if (Input.GetKey (KeyCode.RightArrow)) transform.Translate (Vector3(1,0,0) * Time.deltaTime*speed);
	}

function OnMouseDown () {
	selectedId = GetInstanceID();
}

If you can help thanks.

The original code posted is a mix of some unityscript crap and an empty c# class, the methods executed are also formatted incorrectly as syntax plays a huge role in catching coding errors. You might want to check out the learning videos unity has created. With that said.

using UnityEngine;
using System.Collections;

public class test : MonoBehaviour {
	public float speed = 2.0f;
	
	// Use this for initialization
	void Start () {

	}

	// Update is called once per frame
	void Update () {
		if (Input.GetKey (KeyCode.UpArrow))
			transform.Translate (new Vector3(0,1,0) * Time.deltaTime*speed);

		if (Input.GetKey (KeyCode.DownArrow)) 
			transform.Translate (new Vector3(0,-1,0) * Time.deltaTime*speed);

		if (Input.GetKey (KeyCode.LeftArrow))
			transform.Translate (new Vector3(-1,0,0) * Time.deltaTime*speed);

		if (Input.GetKey (KeyCode.RightArrow)) 
			transform.Translate (new Vector3(1,0,0) * Time.deltaTime*speed);
	}
}

You will have to attach this script to a gameobject you want to move. You will also want to manipulate the speed variable as i set it with a default of 2.0f, but will be available in the inspector to dork around with.